Make SIM import screen an activity

This fixes an accessibility bug where the toolbar navigation icon was
announced instead of the title when the screen is displayed

test
* manually verify that SIM import works as previously when launched from
  settings and from assistant.
* manually verify that activity label is announced instead of navigation
  icon

Bug 32947074

Change-Id: I1116d626f13842ad78e287c98dd3a051796b1f5f
diff --git a/AndroidManifest_common.xml b/AndroidManifest_common.xml
index a41bedd..b2a3c88 100644
--- a/AndroidManifest_common.xml
+++ b/AndroidManifest_common.xml
@@ -441,6 +441,11 @@
         <activity android:name=".common.vcard.ShareVCardActivity"
                   android:theme="@style/BackgroundOnlyTheme" />
 
+         <activity android:name=".activities.SimImportActivity"
+             android:theme="@style/PeopleThemeAppCompat.FullScreenDialog.SimImportActivity"
+             android:label="@string/sim_import_title" />
+
+
         <service
             android:name=".common.vcard.VCardService"
             android:exported="false" />